#include<iostream>
#include<cmath>
#include<algorithm>
#include<string>
#include<map>
using namespace std;
int main() {
    int n;
    while (cin >> n) {
        int score, num;
        if (n == 0) {
            return 0;
        }
        int arr[1000] = { 0 };
        for (int i = 0;i < n;i++) {
            cin >> num;
            arr[num]++;
        }
        cin >> score;
        cout << arr[score] << endl;
    }
    return 0;
}